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1
USRE45001E1
Publication/Patent Number: USRE45001E1
Publication date: 2014-07-08
Application number: 13/179,256
Filing date: 2011-07-08
Abstract: An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2), (i) dividing the time length of the recording mark nT into η1T, α1T, β1T, α2T, β2T, . . . , αiT, βiT, . . . , αmT, βmT, η2T  in that order (m is a pulse division number; Σi(αi+βi)+η1+η2=n; αi (1≦i≦m) is a real number >0; βi (1≦i≦m−1) is a real number>0; βm is a real number ≧0; and η1 is a real number of −2≦η1≦2 and η2 is a real number of −2≦η2≦2); radiating recording light with a recording power Pwi in a time duration of αiT (1≦i≦m), and radiating recording light with a bias power Pbi in a time duration of βiT (1≦i≦m), the bias power being Pbi<Pwi and Pbi<Pwi+1; and (ii) changing m, αi, βi, η1, η2, Pwi and Pbi according to n of the time length nT of the recording mark; wherein the pulse division number m is 2 or more for the time duration of at least one recording mark and meets n/m ≧1.25 for the time length of all the recording marks. An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T ...more ...less
2
EP1475784B1
Publication/Patent Number: EP1475784B1
Publication date: 2014-12-24
Application number: 03705130.7
Filing date: 2003-02-13
Abstract: The present invention provides CD-RW which makes high velocity recording at a level of at least 24-times velocity possible, rewritable DVD which makes high velocity recording at a level of at least 6-times velocity possible, and a recording method therefor, while maintaining interchangeability with conventional CD-RW standards and rewritable DVD standards. A rewritable optical recording medium comprising a substrate and a phase-change type recording layer, wherein a portion in a crystalline state corresponds to an unrecorded or erased state, and a portion in an amorphous state correspond to a recorded state, to record EFM modulated information by forming amorphous marks by irradiating the recording layer with a recording laser beam, and wherein recording is carried out by irradiating a recording laser beam having a wavelength of about 780 nm through an optical system having a numerical aperture NA of 0.5 or 0.55, at 24-times velocity or 32-times velocity of the reference velocity, where the reference velocity (1-time velocity) is a linear velocity of from 1.2 m/s to 1.4 m/s, modulation m11 of record signals is from 60% to 80%, the top value Rtop of the reflectivity of the high pattern is from 15% to 25%, and jitters are at most 35 nsec. The present invention provides CD-RW which makes high velocity recording at a level of at least 24-times velocity possible, rewritable DVD which makes high velocity recording at a level of at least 6-times velocity possible, and a recording method therefor, while maintaining ...more ...less
3
CN101714369B
Publication/Patent Number: CN101714369B
Publication date: 2013-04-24
Application number: 200910225950
Filing date: 2005-07-15
Abstract: To provide a very high density optical recording medium having good recording/reading characteristics by using a substrate which can be stably formed and has a relatively small groove depth. In the optical recording medium 20 of a surface incidence type
4
TWI391927B
Publication/Patent Number: TWI391927B
Publication date: 2013-04-01
Application number: 94124131
Filing date: 2005-07-15
Abstract: An extremely high-density optical recording medium having excellent record reproducing characteristics is provided by using a substrate which can be stably formed and has a relatively shallow groove depth. An optical recording medium (20)
5
US8114496B2
Publication/Patent Number: US8114496B2
Publication date: 2012-02-14
Application number: 12/160,856
Filing date: 2007-01-11
Abstract: Provided is an extremely high-density optical recording medium with excellent jitter characteristics and good recording/reproducing characteristics. An optical recording medium 20 comprises a substrate 21 with a guide groove formed therein, a layer 23 with a light reflection function, a recording layer 22 comprising a dye as a main component with a light absorption function for a wavelength of recording/reproducing light in an unrecorded state, and a cover layer 24 capable of transmitting the recording/reproducing light incident to the recording layer 22, in the order mentioned; an interlayer 30 containing at least one element selected from the group consisting of Ta, Nb, V, W, Mo, Cr and Ti, is provided between the layer 23 with the light reflection function and the recording layer 22. Provided is an extremely high-density optical recording medium with excellent jitter characteristics and good recording/reproducing characteristics. An optical recording medium 20 comprises a substrate 21 with a guide groove formed therein, a layer 23 with a light reflection ...more ...less
6
TWI364759B
Publication/Patent Number: TWI364759B
Publication date: 2012-05-21
Application number: 95125832
Filing date: 2006-07-14
Abstract: An information recording medium (100) is provided with: (i) a first information recording area in which a first track is formed to record or reproduce first information by laser light on the basis of a first track pitch; and (ii) a second information recording area in which a second track is formed to record or reproduce second information by the laser light on the basis of a second track pitch different from the first track pitch An information recording medium (100) is provided with: (i) a first information recording area in which a first track is formed to record or reproduce first information by laser light on the basis of a first track pitch; and (ii) a second information recording area in which a ...more ...less
7
US8331213B2
Publication/Patent Number: US8331213B2
Publication date: 2012-12-11
Application number: 11/988,797
Filing date: 2006-07-13
Abstract: An information recording medium (100) is provided with (i) a first information recording area wherein a first track for reproducing first information based on a first track pitch is formed by a laser beam, and (ii) a second information recording area wherein a second track for reproducing second information based on a second track pitch different from the first track pitch is formed by a laser beam. The groove shape of the first track is different from the groove shape of the second track. An information recording medium (100) is provided with (i) a first information recording area wherein a first track for reproducing first information based on a first track pitch is formed by a laser beam, and (ii) a second information recording area wherein a second track for ...more ...less
8
EP1475784A4
Publication/Patent Number: EP1475784A4
Publication date: 2012-03-14
Application number: 03705130
Filing date: 2003-02-13
Abstract: The present invention provides CD-RW which makes high velocity recording at a level of at least 24-times velocity possible
9
DE69740104D1
Publication/Patent Number: DE69740104D1
Publication date: 2011-03-03
Application number: 69740104
Filing date: 1997-10-02
10
USRE42786E1
Publication/Patent Number: USRE42786E1
Publication date: 2011-10-04
Application number: 10/825,439
Filing date: 2004-04-16
Abstract: An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2), (i) dividing the time length of the recording mark nT into η1T, α1T, β1T, α2T, β2T, . . . , αiT, βiT, . . . , αmT, βmT, η2T  in that order (m is a pulse division number, Σi(αi+βi)+η1+η2=n; αi (1≦i≦m) is a real number >0; βi (1≦i≦m−1) is a real number>0; βm is a real number≧0; and η1 is a real number of −2≦η1≦2 and η2 is a real number of −2≦η2≦2); radiating recording light with a recording power Pwi in a time duration of αiT (1≦i≦m), and radiating recording light with a bias power Pbi in a time duration of βiT (1≦i≦m), the bias power being Pbi<Pwi and Pbi<Pwi+1; and (ii) changing m, αi, βi, η1, η2, Pwi and Pbi according to n of the time length nT of the recording mark; wherein the pulse division number m is 2 or more for the time duration of at least one recording mark and meets n/m≧1.25 for the time length of all the recording marks. An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T ...more ...less
11
TWI354284B
Publication/Patent Number: TWI354284B
Publication date: 2011-12-11
Application number: 95128198
Filing date: 2004-03-24
Abstract: To provide a phase-change recording material which enables high-speed recording and erasing
12
CN1756667B
Publication/Patent Number: CN1756667B
Publication date: 2011-06-08
Application number: 200480005588
Filing date: 2004-03-24
Abstract: The present invention relates to a phase-change recording material on which high speed recording/erasing is possible and information recording medium using the same
13
JP4724127B2
Publication/Patent Number: JP4724127B2
Publication date: 2011-07-13
Application number: 2007004696
Filing date: 2007-01-12
Abstract: PROBLEM TO BE SOLVED: To provide a very high-density optical recording medium that has excellent jitter properties and good recording and reproducing properties. SOLUTION: The optical recording medium 20 comprises a substrate 21 having guide grooves
14
HK1110428A1
Publication/Patent Number: HK1110428A1
Publication date: 2011-11-18
Application number: 08100748
Filing date: 2008-01-21
15
DE69943213D1
Publication/Patent Number: DE69943213D1
Publication date: 2011-04-07
Application number: 69943213
Filing date: 1999-09-08
16
TWI345781B
Publication/Patent Number: TWI345781B
Publication date: 2011-07-21
Application number: 96101326
Filing date: 2007-01-12
Abstract: This invention provides a very high-density optical recording medium that has excellent jitter properties and good record reproduction properties. An optical recording medium (20) comprises a substrate (21) having guide grooves
17
CN101055739B
Publication/Patent Number: CN101055739B
Publication date: 2011-02-02
Application number: 200710089624
Filing date: 1999-09-08
Abstract: The invention provides a medium for recording optical information
18
HK1110427A1
Publication/Patent Number: HK1110427A1
Publication date: 2011-08-05
Application number: 08100747
Filing date: 2008-01-21